#423637
Closest named color: Onyx (#343A40). oklch(34.6% 0.017 12.3), rgb(66, 54, 55).
Aa
White text reads best on this color (11.57:1).
About this color
#423637 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.027 away. White text reads best on it, at 11.57:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.81:1 |
| White text | 11.57:1 |
Values
| HEX | #423637 |
| RGB | rgb(66, 54, 55) |
| HSL | hsl(355, 10%, 24%) |
| OKLCH | oklch(34.6% 0.017 12.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #423637 | 11.57:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #423637 | 1.81:1 | Fails | Lc 0.0 | Not readable |
| #423637 text on white | 11.57:1 | AAA | Lc 96.6 | Preferred for body text |
| #423637 text on black | 1.81:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F6F5F5
oklch(97.1% 0.001 17.2)
-
Step 100
100
#ECE9E9
oklch(93.6% 0.003 17.2)
-
Step 200
200
#DED7D8
oklch(88.5% 0.008 7.3)
-
Step 300
300
#C9BDBE
oklch(80.9% 0.014 11.6)
-
Step 400
400
#AD9C9D
oklch(70.8% 0.02 13.6)
-
Step 500
500
#998385
oklch(63.1% 0.027 11.7)
-
Step 600
600
#836D6F
oklch(55.6% 0.028 11.8)
-
Step 700
700
#6F5B5C
oklch(49.1% 0.026 14.7)
-
Step 800
800
#5A4A4C
oklch(42.6% 0.022 9.6)
-
Step 900
900 (this color)
#423637
oklch(34.6% 0.017 12.3)
-
Step 950
950
#2C2425
oklch(27% 0.012 9.4)
#423637 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #383837 | 0.018 |
| Deuteranopia (no green cones) | #3B3A37 | 0.017 |
| Tritanopia (no blue cones) | #453536 | 0.006 |
| Achromatopsia (no color) | #393939 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423637
#423637
oklch(34.6% 0.017 12.3)
- #2F3C3C
#2F3C3C
oklch(34.5% 0.017 196.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #423637, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.027
- Charcoal Grey #3C4142 ΔE 0.034
- Gunmetal #293241 ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.059
- Dark Blue Grey #1F3B4D ΔE 0.060
- Charcoal #264653 ΔE 0.066
- Pakistan Green #283618 ΔE 0.071
- Dark Grey Blue #29465B ΔE 0.072
Use #423637 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.